Straights have maintaince, but my Slant Sledge (Merkur 39C) w/ feathers destroys my stuble in no time. There is no reason at all anything with a disposiable blade should take any longer. Actually straights can be faster bar mantaince due to longer cutting edge.
(As an aside de is cheap as chips as well)
QFT. Have the same setup exactly. Way better shave than with a cartridge razor. And far, FAR cheaper.